How long does it take form marigold, rice, wheat, coconut, mango plants to come to flower? In some plants, where flowering occur more than once, what would you call the inter-flowering period-juvenile or mature ?

Fill in the blanks: (1) Wheat, barley end rye have two kinds of varieties: winter and spring varieties. The ‘spring’ variety are normally planted in ....a.... and come to flower and produce grain before the end of growing season. (2) 'Winter varieties, however if planned in ..b... would normally fail to flower or produce mature grain within a span of flowering season. (3) hence ‘winter’ varieties are planted in ..c.... . They germinate, and over ........d come out as harvested usually around mid-summer.

Some varieties of wheat are known as spring wheat while others are called winter wheat. Former variety is sown and planted in spring and is harvested by the end of the same season. Hower winter varietis if planted in spring fail to flower or produce mature grains within a span of a flowering season . Explain, why?